Probing higher-order corrections in dijet production at the LHC

Preprint number: CP3-Origins-2012-2 and DIAS-2012-3
Authors: Simone Aliolo (Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley), Jeppe Rosenkrantz Andersen (CP3-Origins), Carlo Oleari (Universit`a di Milano-Bicocca and INFN, Sezione di Milano-Bicocca), Emanuele Re (IPPP, Department of Physics, University of Durham), and Jennifer M. Smillie (School of Physics and Astronomy, University of Edinburgh)
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We discuss the comparisons of several kinematic distributions, measured by the ATLAS and CMS Collaborations for dijet production, with the results computed with three approaches: using a fixed next-to-leading order calculation, with the POWHEGBOX and with HEJ. We study other interesting kinematic distributions, exploring the effect of several sets of cuts. Previous experimental studies have dealt with kinematic distributions where the predictions of the three approaches were very similar. In this article,
we investigate kinematic distributions where the resummed effects in POWHEG and HEJ are enhanced with respect to the fixed next-to-leading order result, since different QCD-radiation regimes are probed, and we suggest a few kinematic distributions where the predictions from POWHEG and HEJ are different, and could be further investigated experimentally.